Science and Technology of Nuclear Installations / 2018 / Article / Tab 3

Research Article

Numerical Simulation of Decontamination of Airborne Fission Products during In-Vessel Release Phase by Containment Spray

Table 3

Important parameters used for simulation [35].

Parameter SymbolValue

Containment-free volume (m3)57600
Containment-free surface (m2)~34374
Leakage rate (m3/s)14.15
Core damage fraction (%)35%
Fuel release fraction (%)9.0 × 10−1
Water release fraction (%) 3.00 × 10−1–1.0 × 102
Recirculation rate (m3/s)1–5
Recirculation filtration efficiency (%)10%–90%
Exhaust filter efficiency (%)90–98
Fraction of immediately released radioisotopes (%)2.0 × 10−1
Mixing rate  0.1–1.0
Spray flow rate (m3/s)0.1–1.0
Droplet size (micron)100–1000
Deposition velocity (m/s)5.5 × 10−4
Resuspension rate s−1≤2.3 × 10−6

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